Weight Loss & MetabolicStrong Evidence

Retatrutide Peptide Therapy

Benefits, Side Effects, Cost & Protocols

Retatrutide peptide molecular structure diagram from PubChem

Retatrutide (LY-3437943) is an experimental triple glucagon hormone receptor agonist (GIP/GLP-1/glucagon) developed by Eli Lilly for obesity treatment. It represents a novel approach targeting three metabolic pathways simultaneously for enhanced weight loss efficacy.

ByChris Riley(CFA)&Alex Evans, PharmD, MBA(PharmD, MBA)|Updated May 19, 2026

Clinically Reviewed

Reviewed by Alex Evans, PharmD, MBA · Updated May 2026

Evidence-Based

Sourced from FDA, PubMed & ClinicalTrials.gov · View sources

FDA Status

Research Only Not currently approved for human use in the US. Available as a research compound. Not eligible for compounding.

Evidence

Strong Evidence

Who Is Retatrutide Best For?

Significant weight loss potentialTriple receptor activationMetabolic enhancementAppetite control

How Retatrutide Works

Triple agonist targeting GLP-1 (appetite/insulin), GIP (metabolic efficiency), and glucagon (fat burning) receptors for synergistic metabolic effects.

Retatrutide FAQ

What is RETATRUTIDE?

Retatrutide is a triple agonist peptide representing the cutting edge of weight loss research. It targets GLP-1, GIP, and glucagon receptors simultaneously, showing remarkable results in clinical trials for weight reduction.

How does RETATRUTIDE work?

Triple agonist targeting GLP-1 (appetite/insulin), GIP (metabolic efficiency), and glucagon (fat burning) receptors for synergistic metabolic effects.

Is RETATRUTIDE legal to buy?

RETATRUTIDE is sold as a research chemical for laboratory use only. It is not approved for human use by the FDA. Regulations vary by jurisdiction.

Where can I buy RETATRUTIDE?

RETATRUTIDE is available as a research compound from verified online vendors. Always verify third-party testing before purchasing.

What category does RETATRUTIDE belong to?

RETATRUTIDE is primarily classified as a weight loss & metabolic peptide. Peptides researched for their effects on weight management, fat metabolism, appetite regulation, and metabolic enhancement. This category includes GLP-1 agonists, dual/triple agonists, and other metabolic peptides.

What are the research benefits of RETATRUTIDE?

RETATRUTIDE has been studied for: Significant weight loss potential, Triple receptor activation, Metabolic enhancement, Appetite control. Triple agonist; highest demand peptide in current research.

Key Studies

136 total on PubMed88 human trials

Retatrutide for the treatment of obesity, obstructive sleep apnea and knee osteoarthritis: Rationale and design of the TRIUMPH registrational clinical trials

Giblin K, Kaplan LM, Somers VK et al

Diabetes Obes Metab · Diabetes Obes MetabPhase 3

Retatrutide reduces body weight, apnea-hypopnea index, and knee osteoarthritis pain

Triple-Hormone-Receptor Agonist Retatrutide for Obesity - A Phase 2 Trial

Jastreboff AM, Kaplan LM, Frías JP et al

N Engl J MedPhase 2

Retatrutide produced dose-dependent weight loss up to 24.2% at 48 weeks versus 2.1% for placebo.

Retatrutide produced dose-dependent weight loss up to 24.2% at 48 weeks versus 2.1% for placebo

Retatrutide, a GIP, GLP-1 and glucagon receptor agonist, for people with type 2 diabetes: a randomised, double-blind, placebo and active-controlled, parallel-group, phase 2 trial conducted in the USA

Rosenstock J, Frias J, Jastreboff AM et al

LancetPhase 2

Retatrutide improved HbA1c by up to 2.02% and reduced body weight by up to 16.94% in type 2 diabetes.

Retatrutide improved HbA1c by up to 2.02% and reduced body weight by up to 16.94% in type 2 diabetes

Effects of retatrutide on body composition in people with type 2 diabetes: a substudy of a phase 2, double-blind, parallel-group, placebo-controlled, randomised trial

Retatrutide Compound Data

Molecular Formula

C221H342N46O68

Molecular Weight

4731 g/mol

IUPAC Name

20-[[(1S)-4-[2-[2-[2-[[(5S)-5-[[(2S)-6-amino-2-[[(2S)-2-[[(2S)-2-[[(2R)-2-[[(3S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S,3R)-2-[[2-[[(2S)-5-amino-2-[[2-[[(2S)-2-amino-3-(4-hydroxyphenyl)propanoyl]amino]-2-methyl-propanoyl]amino]-5-oxo-pentanoyl]amino]acetyl]amino]-3-hydroxy-butanoyl]amino]-3-phenyl-propanoyl]amino]-3-hydroxy-butanoyl]amino]-3-hydroxy-propanoyl]amino]-3-carboxy-propanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-3-hydroxy-propanoyl]amino]-3-methyl-pentanoyl]amino]-2,4-dimethyl-pentanoyl]amino]-4-methyl-pentanoyl]amino]-3-carboxy-propanoyl]amino]hexanoyl]amino]-6-[[(1S)-2-[[(1S)-4-amino-1-[[2-[[(1S)-2-[[(1S)-2-[[(2S)-1-[[(1S)-1-[[(1S)-2-[[(1S)-1-[[(1S)-1-[[(1S)-1-[[2-[[2-[(2S)-2-[[(1S)-2-[[(1S)-2-[[2-[[(1S)-2-[(2S)-2-[(2S)-2-[(2S)-2-[[(1S)-2-amino-1-(hydroxymethyl)-2-oxo-ethyl]carbamoyl]pyrrolidine-1-carbonyl]pyrrolidine-1-carbonyl]pyrrolidin-1-yl]-1-methyl-2-oxo-ethyl]amino]-2-oxo-ethyl]amino]-1-(hydroxymethyl)-2-oxo-ethyl]amino]-1-(hydroxymethyl)-2-oxo-ethyl]carbamoyl]pyrrolidin-1-yl]-2-oxo-ethyl]amino]-2-oxo-ethyl]carbamoyl]-3-carboxy-propyl]carbamoyl]-3-methyl-butyl]carbamoyl]-3-methyl-butyl]amino]-1-[(4-hydroxyphenyl)methyl]-2-oxo-ethyl]carbamoyl]-3-carboxy-propyl]carbamoyl]-2-methyl-butyl]amino]-1-benzyl-2-oxo-ethyl]amino]-1-methyl-2-oxo-ethyl]amino]-1,1-dimethyl-2-oxo-ethyl]carbamoyl]-4-oxo-butyl]amino]-1-methyl-2-oxo-ethyl]amino]-6-oxo-hexyl]amino]-2-oxo-ethoxy]ethoxy]ethylamino]-1-carboxy-4-oxo-butyl]amino]-20-oxo-icosanoic acid

View full compound on PubChem

Retatrutide News

Retatrutide Peptide: What It Is, Side Effects & Safety - Drugwatch.com

Drugwatch.com · 1 month ago

Lilly's Next Obesity Drug Is So Powerful It's Already Getting Copied - Investor's Business Daily

Investor's Business Daily · 5 days ago

The peptide problem: Hype is outrunning the evidence - The Conversation

The Conversation · 12 days ago

Is Retatrutide safe to use? The peptide gym-goers claim is more powerful than Ozempic - The Independent

The Independent · 21 days ago

Why Fitness Bros Are Buzzing About the New Weight-Loss Peptide Retatrutide - GQ

GQ · 1 month ago

News aggregated via Google News. Inclusion does not imply endorsement.

Medical Disclaimer: The information on this page is for educational purposes only and does not constitute medical advice. Peptide therapies have not been evaluated by the FDA for most listed indications.All prices shown are estimates based on publicly available data and may not reflect current pricing — providers and brands set their own prices and can change them at any time. Always verify pricing directly with the provider before purchasing. Consult a licensed healthcare provider before starting any peptide protocol.

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